Ore-sampler.



G. H. URQUHART.

ORB SAMPLER. APPLICATION FILED MAY 14, 1913.

1,088,638, Patented Feb. 24, 1914.

951;; 71. 19 al ke w;

UNITED STATES PATENT OFFICE.

CHARLES H. URQUHART, 0F NEWARK, NEW JERSEY, ASSIGNOR OF ONE-HALF TO CHARLES E. KNOX, OF SAN FRANCISCO, CALIFORNIA.

ORE-SAMPLER.

Specification of Letters Patent.

Application filed May 14, 1913.

1,088,638. Patented Feb. 24, 1914.

Serial No. 767,516.

table is rotated, and that the rotation of the table is preferably controlled automatically so that it will take place only when the apparatus associated with the hopper is in con dition to receive more ore. operation of the device the rotation of the table will therefore be intermittent and the flow of the ore into the hopper will proceed at a correspondingly intermittent rate.

A portion of the wall of the hopper 11 is cut away and replaced by a flap 13 pivoted at 1 1 to the hopper. Guide plates 15 and 16 are mounted adjacent to the flap 13 and its extension 17 to form a chute capable of oscillating about the joint 1 1 and completely interrupting the flow of ore, diverting it momentarily into the receptacle 18. Means for oscillating the flap and its associated parts comprise a cam 19 mounted on the lower surface of the circular table adapted to engage a follower or roller 20 on one arm of the lever 21 pivoted at 22, this lever communicating motion to the fiap through the arm 23 and crank Means for adjusting the throw of the flap are provided by forming a plurality of holes 25 in one end of the arm 28, any one of which may be engaged by the pin 26 in the end of the lever 21. weight 2'7, or any other suitable means, may be utilized for maintaining the flap in its normal position, namely, that shown in Fig. at, when the how of the ore is uninterrupted.

lVhen the parts are set in motion it will be obvious that at each rotation of the table the cam 19 will engage its roller 20 on the lever 21, thus forcing the parts into the operative positions shown in Fig. 1, so that momentarily the flow of ore entirely across the stream is diverted into the sampling box. As soon as the cam 19 passes the roller 20 the parts will be released and the weight 27 will cause them to return to their initial positions. It will be apparent that by adjusting the arm 23 relatively to the lever 21 by the means already described, the throw of the arm, and consequently the are through which the flap oscillates, may be increased or reduced, thus taking a larger or smaller sample of the ore. Moreover, it is within my invention to provide two or more cams in case the table rotates at such a rate that more than one sample per revolution is desired.

\Vhen a structure such as that which I have shown is used, a sample which is rep- To all whom it may conccrn Be it known that I, CHARLES H. UR U- HART, a citizen of the United States, residing in the city of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Ore- Samplers, of which the following is a specification.

My invention relates to means for taking a correct average sample from a stream of ore. There are three essential requirements for such a device: first, that the frequency of the samples should be proportionate to the rate of flow of the ore; second, that the sample shall represent a correct average of the flow, that is, not be restricted to any one part of the stream; and third, that the device shall be capable of diverting from the stream the largest as well as the smallest particlcs of ore which are likely to be found in the stream. My improved device is particularly designed to meet all these requirements and at the same time be readily applicable to existing apparatus.

In the accompanying drawings which form a part of this specification, Figure 1 is an elevation partly in section of my improved device as applied to an ore feeder; Fig. 2 is a transverse sectional view on line II-II of Fig. 1; Fig. 3 is a plan view of the mechanism, and Fig. 4 is a fragmentary transverse sectional view similar to Fig. 1 showing the parts in inoperative position.

Referring to the drawings in detail, the numeral 1 indicates a chute for feeding ore and the like upon the circular feeder table 2 mounted on the shaft 3. Means for rotating the table include the pulley &, the shaft 5, beveled gear 6 meshing with the beveled gear 7 on the lower surface of the table. The entire structure is adapted to be suspended by means of the hangers 8 and 9 supporting the frame 10. The periphery of the table is mounted adjacent to the receiving hopper 11 of a mortar 12 or any other device into which the ore is to be fed. In the case of a mortar, the driving means between the mortar and the feeding table will be interconnected in the usual and wellknown manner, so that the amount of ore fed is controlled by the rate at which the mortar works upon the ore fed to it.

It will be understood by those skilled in the art that the ore is fed from the feeder table 2 into the hopper 11 only when the In the normal i resentative of the entire flow at the particular instant is taken and pieces of ore of any size from the maximum to the minimum are accommodated. A truly average sample is thus obtained.

lVhile I have illustrated and described only one specific embodiment of my invention, I appreciate that it wide application and I do not desire to be limited to the precise structure shown and described.

Having thus described my invention, I claim:

1. In an ore sampler, means for directing and supplying a stream of ore including a rotary feed table, means for rotating said table and means for sampling the ore d livered by said table including a barrier extending the full. width of the stream delivered by said table, and means for periodically interpesing said barrier into the stream of ore delivered by said table to dirert the same.

2. In an ore sampler, means for directing and supplying a stream of ore including a rotary feed table, means for rotating said table and means for sampling the ore delivered by said table including a barrier extending the full width of the stream delivcred by said table, and means actuated by the operating mechanism of said table for periodically inter-posing said barrier into the stream of ore delivered by said table to divert the same.

3. In an ore sampler, means for directing and supplying stream of ore including a rotary feed table, means for rotating said table and means for sampling the ore delivered by said table including a barrier extending the full width of the stream de livered by said table, and means for pcriodically interposing said barrier into the stream of ore deliveed by said table to di vert the same, including a cam on said table actuating a follower connected with said barrier.

in an ore sampler, means for directing is susceptible of l 1,oss,ess

and supplying a stream of ore including guide members and a. rotary table adjacent thereto, means for rotating said table and means for sampling the ore delivered by said table including a barrier pivoted to a fixed part and extending the full distance between said guides, and means for pcriodically interposing said barrier into the stream of ore delivered by said table to divert the same, including a cam on said table, a follower adapted to be engaged thereby, and adjustable means connecting said follower with the barrier.

5. In an ore sampler, means for directing and supplying a stream of: ore including guide members and a rotary table adjacent thereto, means for rotating said table and means for sampling the ore delivered by said table including a barrier pivoted to a fixed part and extending the full distance between said guides, and means for pe riodically inteiposing said barrier into the stream of ore delivered by said table to divertthe same, including a cam operated in synchronism with said table, a follower adapted to be engaged thereby, and means connecting said follower with said barrier.

In an ore sampler, means for directing and supplying a stream of ore including guide members and a rotary table adjacent thereto, means for rotatii'ig said table and means for sampling the ore delivered by said table including a barrier pivoted to a iixed part and extending the full distance between said guides, and means for pcriodically interposing said barrier into the stream of ore delivered by said table to di vert the same, including a cam operated in S 'l1Cl1l'Ol1lSl1l with said table, a follower adapted to be engaged thereby, and adjustable lcver means connecting said follower with said barrier whereby the oscillation of said follower may be altered.

CHARLES H. URQUHART. li itnesses GERALD Tnnwinmenn, OLIVER lVILLIAMs M Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 1). G. 

